Heatingreservoir such as a hotwaterbottle etc. especially for heating beds

摘要

Heatingreservoir such as a hotwaterbottle for domestic use etc comprising a nondeformable envelope enclosing a heat storage medium whereas the envelope is completely closed and the heat storage medium is a substance with a heat transition from solid to liquid at a temperature equal to the main temperature at which the reservoir is used and heating element being arranged inside or against the outer wall of the envelope which heating elements being connectable to an external voltage source.